自定义分页器，用于django在后端查询出来的数据，展示到前端页面，以分页的形式展示出来。
1、将封装好的代码，写入py文件中，例如：mypagination.py
# mypagination.py
class Pagination(object):
def __init__(self, current_page, all_count, per_page_num=10, pager_count=11):
"""
封装分页相关数据
:param current_page: 当前页
:param all_count: 数据库中的数据总条数
:param per_page_num: 每页显示的数据条数
:param pager_count: 最多显示的页码个数
"""
try:
current_page = int(current_page)
except Exception as e:
current_page = 1
if current_page < 1:
current_page = 1
self.current_page = current_page
self.all_count = all_count
self.per_page_num = per_page_num
# 总页码
all_pager, tmp = divmod(all_count, per_page_num)
if tmp:
all_pager += 1
self.all_pager = all_pager
self.pager_count = pager_count
self.pager_count_half = int((pager_count - 1) / 2)
@property
def start(self):
return (self.current_page - 1) * self.per_page_num
@property
def end(self):
return self.current_page * self.per_page_num
def page_html(self):
# 如果总页码 < 11个：
if self.all_pager <= self.pager_count:
pager_start = 1
pager_end = self.all_pager + 1
# 总页码 > 11
else:
# 当前页如果<=页面上最多显示11/2个页码
if self.current_page <= self.pager_count_half:
pager_start = 1
pager_end = self.pager_count + 1
# 当前页大于5
else:
# 页码翻到最后
if (self.current_page + self.pager_count_half) > self.all_pager:
pager_end = self.all_pager + 1
pager_start = self.all_pager - self.pager_count + 1
else:
pager_start = self.current_page - self.pager_count_half
pager_end = self.current_page + self.pager_count_half + 1
page_html_list = []
# 添加前面的nav和ul标签
page_html_list.append('''
''')
return ''.join(page_html_list)2、导入后端，将查询的数据交给自定义分页器处理，然后再返回给前端
# 示例一
from app01.utils.mypagination import Pagination
def home(request):
# 将网站所有的文章全部查询出来展示到前端
article_list = models.Article.objects.all()
page_obj = Pagination(current_page=request.GET.get('page', 1), all_count=article_list.count())
page_queryset = article_list[page_obj.start:page_obj.end]
return render(request, 'home.html', locals())
# 示例二
from mypagination import Pagination
def get_book(request):
book_list = models.Book.objects.all()
current_page = request.GET.get("page",1)
all_count = book_list.count()
page_obj = Pagination(current_page=current_page,all_count=all_count,per_page_num=10)
page_queryset = book_list[page_obj.start:page_obj.end]
return render(request,'booklist.html',locals())3、前端渲染
{% for article_obj in page_queryset %}
-
{{ article_obj.title }}
{{ article_obj.desc }}
{{ article_obj.blog.userinfo.username }}
发布于
{{ article_obj.create_time|date:'Y-m-d' }}
评论（{{ article_obj.comment_num }}）
点赞（{{ article_obj.up_num }}）
{% endfor %}
{{ page_obj.page_html|safe }}
{% for book in page_queryset %}
{{ book.title }}
{% endfor %}
{{ page_obj.page_html|safe }}